（ Lin Hong felt worried after listening to Professor Wang's talk because she is going to be a secretary who will have to work with the computer in the office. So she discusses this with Professor Wang. ）

L: After I heard your talk. I felt very worried about computer using. Since I'll work with computer in the office most of the time. Professor Wang, are there any ways to protect us while we are using computers?

W: Of course. There are some precautions for both types of computer users. First of all, there should be an alternative source of light from that of the screen itself. Secondly, rest your eyes frequently, if possible look at something in the distance to give them a change from the close focus used on the screen. Thirdly, the screen should be properly tuned; a shaky （抖动的） or fuzzy （模糊的） image can cause nausea of headaches. Fourthly, your seat and working area should be specially designed so that you are sitting in a comfortable position, not er… screwed up or bent over. And finally, get up regularly and walk about （四处走动） in the room. Better still; go out into the fresh air occasionally.

L ： Thank you very much ． I'll remember what you have said when I use my computer.